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CURLOPT_FTP_USE_EPSV(3) Library Functions Manual CURLOPT_FTP_USE_EPSV(3) NAME CURLOPT_FTP_USE_EPSV - use EPSV for FTP SYNOPSIS #include <curl/curl.h> CURLcode curl_easy_setopt(CURL *handle, CURLOPT_FTP_USE_EPSV, long epsv); DESCRIPTION Pass epsv as a long. If the value is 1, it tells curl to use the EPSV com- mand when doing passive FTP downloads (which it does by default). Using EPSV means that libcurl first attempts to use the EPSV command before using PASV. If you pass zero to this option, it does not use EPSV, only plain PASV. The EPSV command is a slightly newer addition to the FTP protocol than PASV and is the preferred command to use since it enables IPv6 to be used. Old FTP servers might not support it, which is why libcurl has a fallback mech- anism. Sometimes that fallback is not enough and then this option might come handy. If the server is an IPv6 host, this option has no effect. DEFAULT 1 PROTOCOLS This functionality affects ftp only EXAMPLE int main(void) { CURL *curl = curl_easy_init(); if(curl) { CURLcode result; curl_easy_setopt(curl, CURLOPT_URL, "ftp://example.com/old-server/file.txt"); /* let's shut off this modern feature */ curl_easy_setopt(curl, CURLOPT_FTP_USE_EPSV, 0L); result = curl_easy_perform(curl); curl_easy_cleanup(curl); } } AVAILABILITY Added in curl 7.9.2 RETURN VALUE curl_easy_setopt(3) returns a CURLcode indicating success or error. CURLE_OK (0) means everything was OK, non-zero means an error occurred, see libcurl-errors(3). SEE ALSO CURLOPT_FTPPORT(3), CURLOPT_FTP_USE_EPRT(3) libcurl 2026-06-11 CURLOPT_FTP_USE_EPSV(3)
NAME | SYNOPSIS | DESCRIPTION | DEFAULT | PROTOCOLS | EXAMPLE | AVAILABILITY | RETURN VALUE | SEE ALSO
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